you are smart enough yourself!
Denise,
I agree w/ Wahine...in a way that you won't regret, tell him that your goals and his methods are not compatible.
You have enough experience and are smart enough to get ready for this race on your own. You are obviously in tune w/your body and mind (more than the coach) and know what is right for you.
I advise you to follow your instincts and train the way you feel is right for you. Training should be an enjoyable part of the IM process, not a continuous torture for 6 months (or whatever). Everyone has different thresholds of what amount of training is best at different periods in their life.
When overall life stress is low, you can tolerate more training volume. I have observed this in myself. When I was working a relatively easy job w/no late nights, I could train 2-3 hrs per day in the week and 4-6 hrs on the weekend. When I took a job w/ alot more responsibility and later hours, I had to cut back my weekly training hours. I still improved my IM time by 1 hr.
I am sure you have Gordo's book, Going Long. That, plus the IM training primer on the Crucible Fitness website, are the basic training plan to get ready (in my opinion).
Sorry this is so long, but I support you to make the choice that will make you feel better about yourself.
Good luck,
Laura